Kerning classes

[Fontlab Studio 5] I'm building a font that is small caps, in other words, all the letters are uniform in width. I meticulously kerned the lowercase first, and I'd like to apply to lowercase kerning to the uppercase, which I did using kerning classes, i.e. _kern1: a' A

However, I would also like that same kerning to apply to the Uppercase-to-Uppercase, i.e. the kerning from fa to be the same as FA.

Using the classes, and putting a' A in the same class seems to only apply the kerning to Fa, and not FA.